| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to what used to [be] | 7 |
|
| 2 | to [Wh det] used to be | 7 |
|
| 3 | to [Wh det] used to be | 7 |
|
| 4 | to [Wh det] used to [be] | 7 |
|
| 5 | to [Wh det] used to [be] | 7 |
|
